Sheet feeding or delivering – Feeding – Separators
Patent
1989-12-01
1991-06-25
Schacher, Richard A.
Sheet feeding or delivering
Feeding
Separators
271127, B65H 306
Patent
active
050260413
ABSTRACT:
The present invention relates to an automatic cut sheet feeding apparatus for feeding a stack of sheet one by one into a printer, and particularly to an automatic sheet feeding apparatus used for a printer for making an impact print onto a sheet positioned on a platen by a wire dot, shuttle, or other methods. In this invention, the positive rotation of the sheet feed motor is transmitted to a sheet feed roller through a rotation transmission mechanism to rotate the sheet feed roller, thereby sending one of sheet on a pressure plate to a printer unit at a time. Then, when the sheet is grasped by the sheet feed rollers of the printer unit, the sheet feed motor reversely rotates to a certain extent and its rotation is transmitted to the rack and pinion mechanism through the rotation transmitting mechanism, thereby moving the pressure plate backward against the pushing mechanism to separate the stacked sheets from the sheet feed roller, and at the same time, the reverse transmission of the pressure plate is retained by the holding mechanism.
Therefore, in the present invention, to feed a sheet in the print unit the sheet feed unit loses its working effect on the sheet, reducing a sheet feeding load in sending the sheet in the print unit. And the changes in the sheet volume accommodated in the sheet feed stacker can keep a fixed gap which is formed between the stacked sheets and the sheet feed roller due to the backward movement of the pressure plate.
REFERENCES:
patent: 4714243 (1987-12-01), Staniszewski
patent: 4838535 (1989-06-01), Yokoi
Arai Kimikazu
Kitazume Koichi
Daiwa Seiko Inc.
Schacher Richard A,.
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